Why do we do such stupid things?
There are billions to be made, or perhaps stolen, from the American tax payers in arming a military leviathan. These translate into campaign contributions to those controlling the purse.
There are pious platitudes to be muttered about American exceptionalism and the global fight for freedom. These translate into votes from rubes who chant "Murrica, Murrica".
There are jobs to be had by the underclass who opt out of minimum wage drudgery for entry into the military with housing & health benefits. The recipients of our default jobs program will not vote themselves into unemployment.
We are doomed.